JP2022046299A - Fold position adjustment control unit, folding machine, printing machine, fold position adjustment control program, and fold position adjustment control method - Google Patents

Abstract

To provide a fold position adjustment control unit capable of automatically adjusting a folding position of a signature; and to provide a folding machine, a printing machine, a fold position adjustment control program and a fold position adjustment control method thereof.SOLUTION: A fold position adjustment control unit for adjusting a folding position of a signature formed by folding a sheet-like sheet group into two with a pair of folding-down drag rollers comprises a signature length measurement part capable of measuring length in a conveyance direction of the signature passing through the pair of folding-down drag rollers; and a folding position control part for adjusting the folding position of the signature, based on the length in the conveyance direction of the signature measured by the signature length measurement part.SELECTED DRAWING: Figure 1

Description

INDUSTRIAL APPLICABILITY The present invention relates to a fold position adjusting control unit for automatically adjusting the fold position of a signature in a folding machine of a printing machine, a folding machine, a printing machine, a fold position adjusting control program, and a fold position adjusting method. It is about.

Conventionally, in a printing machine for producing signatures such as newspaper, printed continuous paper is cut to a predetermined size by a folding cylinder and a saw cylinder to form a sheet-fed sheet group, and the sheet-fed sheet group is folded. A folding machine is used that folds by pushing it between a pair of folding drag rollers provided directly under the folding blade provided in the above. In such a folding machine, in order to accurately fold the sheet-fed sheet group in half in the center of the transport direction, the signature is folded according to the printing speed of the printing machine, the number of sheets (number of pages) of the sheet-fed sheet group, and the like. It is necessary to adjust the eye position.

In recent years, a folding device including a folding position adjusting device for automatically adjusting such a folding position has been proposed (Patent Document 1). The folding device of Patent Document 1 has a fold position corresponding to conditions such as ascending speed, descending speed, paper quality, number of pages, and paper threading route (influence factor due to position of multicolor pages and path length) of the printing press. It is configured to automatically adjust the crease position by creating a table of correction values, inputting and storing them in advance, and calculating the crease position correction value corresponding to the operating speed.

Japanese Unexamined Patent Publication No. 2002-120968

However, the folding device of Patent Document 1 merely predicts and adjusts the folding position according to the operating speed of the printing machine by using the folding position correction value input and stored in advance. There is a problem that it is not possible to determine whether or not the deviation of the fold position of the actually formed signature has been corrected to an allowable range, and in the end, it is necessary for the operator to manually determine the good paper.

Further, the folding device of Patent Document 1 can additionally correct the misaligned state by operating the manual correction device when the misalignment of the crease position is not corrected to the permissible range after the automatic crease position adjustment. However, since the operator must manually operate this manual correction device, there is still a problem that specialized skills are required and the work load is heavy.

Therefore, the present invention provides a fold position adjusting control unit, a folding machine, a printing machine, a fold position adjusting control program, and a fold position adjusting method capable of automatically adjusting the fold position of the signature. The purpose is to do.

The fold position adjusting control unit according to the present invention is a fold position adjusting control for adjusting the fold position of a signature formed by folding a group of sheet-fed sheets in half with a pair of folding drag rollers. The signature length measuring unit, which is a unit and can measure the length of the signature in the transport direction passing through the pair of folding drag rollers, and the signature measured by the signature length measuring unit. It is characterized by including a fold position control unit that outputs an adjustment signal for adjusting the fold position of the signature based on the length in the transport direction.

In the fold position adjusting control unit according to the present invention, the fold position control unit adjusts the fold position of the signature in the advancing direction or the lagging direction, and changes the length of the signature in the conveying direction. By monitoring, it is preferable to be configured to specify the adjustment direction of the fold position of the signature.

Further, in the fold position adjusting control unit according to the present invention, the fold position control unit is allowed by feedback control based on the length of the signature in the transport direction measured by the signature length measuring unit. It is preferable that the adjustment signal for executing the adjustment control for adjusting the fold position of the signature up to the range can be output.

The folding machine according to the present invention includes the above-mentioned control unit for adjusting the fold position, a pair of folding drag rollers that form a signature by folding the sheet-fed sheet group in half, and a transport direction of the sheet-fed sheet group. The folding cylinder having a folding blade for pushing the central portion between the pair of folding drag rollers is provided, and the folding position adjusting control unit is used to convey the signature as measured by the signature length measuring unit. It is characterized in that an adjustment signal for adjusting the pushing timing of the single-wafer-shaped sheet group by the folding blade can be output based on the length in the direction.

Further, the folding machine according to the present invention further includes a sensor capable of detecting the passing time of the signature passing through the pair of folding drag rollers, and the folding position adjusting control unit is detected by the sensor. It may be configured to measure the length of the signature in the transport direction based on the passing time of the signature.

Further, in the folding machine according to the present invention, the folding position adjusting control unit has the passing time of the signature detected by the sensor and the passing time of the pulse output with the rotation of the folding cylinder. It may be configured to measure the length of the signature in the transport direction based on the number of inputs in the signature.

The printing machine according to the present invention has a paper feed unit in which a roll of continuous paper is set, a printing unit that prints on the continuous paper supplied from the paper feed unit, and a continuous paper after printing. Is provided with a folding machine for creating individual sheet-fed sheet groups by cutting the sheet and folding the sheet-fed sheet group in half to create a signature, and the folding machine is characterized by being the above-mentioned folding machine. And.

The fold position adjustment control program according to the present invention causes the printing press to adjust the fold position of the signature formed by folding the sheet-fed sheet group in half with a pair of folding drag rollers. The adjustment control program is characterized in that the printing machine is made to execute a fold position control process for adjusting a fold position of the signature based on the length of the signature in the transport direction.

The fold position adjusting method according to the present invention is a fold position adjusting method for adjusting the fold position of a signature formed by folding a group of sheet-fed sheets in half with a pair of folding drag rollers. , The signature length measuring step of measuring the length of the signature in the transport direction passing through the pair of folding drag rollers, and the length of the signature in the transport direction measured by the signature length measuring step. Based on the above, it is characterized by including a fold position control step for adjusting the fold position of the signature.

According to the present invention, there is provided a fold position adjusting control unit, a folding machine, a printing machine, a fold position adjusting control program, and a fold position adjusting method capable of automatically adjusting the fold position of a signature. can do.

It is a figure which shows the schematic structure of the folding machine in the printing machine which concerns on embodiment of this invention. It is a block diagram which shows the system configuration of the fold position adjustment control unit which concerns on this embodiment. It is a figure which shows the schematic structure of the vicinity of the folding drag roller in the folding machine which concerns on this embodiment. It is a figure which shows the state which the sheet-fed sheet group shown in FIG. 3 is folded in half by a folding drag roller. FIG. 5A is a diagram showing good paper folded in half at a normal crease position, and FIG. 5B is a diagram showing defective paper folded at a fold position. It is a figure which shows the defective paper in the state which is folded in half diagonally with respect to the transport direction. It is a figure which shows the relationship between the pulse output from a sensor, and the pulse output from a folding body rotation pulse transmitter. It is a figure which shows the advancing direction and the lagging direction of a folding cylinder. It is a flowchart which shows the schematic flow of the fold position adjustment method which concerns on this embodiment.

Hereinafter, suitable embodiments for carrying out the present invention will be described with reference to the drawings. It should be noted that the following embodiments do not limit the invention according to each claim, and not all combinations of features described in the embodiments are essential for the means for solving the invention. .. Further, the drawings are schematic views in which emphasis, omission, and ratio adjustment are appropriately performed to show the present invention, and may differ from the actual shape, positional relationship, and ratio.

[Overall configuration of printing machine]
As shown in FIG. 1, the printing machine 1 according to the present embodiment has a paper feed unit (not shown) in which a roll of continuous paper W is wound and a continuous paper feed unit is supplied. A printing section (not shown) for printing on the paper W and a continuous paper W after printing are cut to create individual sheet-fed sheet group FPs, and the sheet-fed sheet group FP is folded in half for signature. It includes a folding machine 10 for creating the S, an impeller device (delivery fan) 30 for receiving the signature S from the folding machine 10 and transporting the signature S to the downstream side, and a transport mechanism 32. In the printing machine 1 according to the present embodiment, various known ones can be used as the paper feed unit, the printing unit, the impeller device 30, and the transport mechanism 32, and thus the description thereof will be omitted.

[Overall configuration of folding machine]
As shown in FIG. 1, the folding machine 10 vertically folds the printed continuous paper W along the transport direction, and vertically folds the continuous paper W in the width direction (direction orthogonal to the transport direction). A saw cylinder 14 that is cut to create individual sheet-fed sheet group FP, and a folding cylinder 16 that forms a signature S by laterally folding (folding in half) the cut sheet-fed sheet group FP along the width direction. And a pair of folding drag rollers (folding rollers) 20a and 20b, and various rollers (a set of forming rollers 18a) that guide the transportation of the continuous paper W on the transport path from the former 12 to the saw cylinder 14 and the folding cylinder 16. , Upper, middle and lower three sets of nipping rollers 18b, 18c, 18e and one guide roller 18d). In the folding machine 10 according to the present embodiment, various known ones can be used as the former 12, the forming roller 18a, the nipping rollers 18b, 18c, 18e and the guide roller 18d, and thus the description thereof will be omitted.

As shown in FIG. 1, the saw cylinder 14 and the folding cylinder 16 are configured to be rotatable about a rotation axis (not shown) extending orthogonally to the transport direction of the continuous paper W and parallel to the plane of the continuous paper W traveling. It is a columnar cylinder, and is arranged so as to face each other through a transport path of the continuous paper W at a slight interval into which the continuous paper W can be inserted. The saw cylinder 14 and the folding cylinder 16 are provided with a rotation driving means (not shown) connected to the rotation axis at a peripheral speed equal to the transfer speed of the continuous paper W around the rotation axis in the transportation direction of the continuous paper W. In the same direction as that of FIG. 1, that is, in the example in FIG. 1, the saw cylinder 14 is configured to rotate counterclockwise, and the folding cylinder 16 is configured to rotate clockwise. Further, the saw cylinder 14 and the folding cylinder 16 are configured to rotate in a phase relationship such that the saw blade of the saw blade 14 described later and the blade receiver of the folding cylinder 16 face each other and come into contact with each other.

The saw blade 14 has a circumference that is substantially equal to the length for cutting the continuous paper W, that is, twice the length in the transport direction of the sheet-fed sheet group FP, with an interval of 180 degrees in the circumferential direction. It has two saw blades (not shown). Therefore, the saw cylinder 14 is configured to cut the continuous paper W once every half rotation. The circumference of the saw body 14 and the number of saw blades installed can be appropriately changed as long as they are N times the length of the sheet-fed sheet group FP in the transport direction (N is an integer of 1 or more), for example, a saw. The peripheral length of the body 14 may be substantially equal to the length in the transport direction of the sheet-fed sheet group FP, and only one saw blade may be provided.

The folding cylinder 16 has a circumference substantially equal to that of the saw cylinder 14, and is provided with two needle members (not shown) provided at an interval of 180 degrees and an interval of 180 degrees. It has two folding blades (not shown). A blade holder (not shown) for receiving the saw blade of the saw blade 14 is provided in the vicinity of each needle member on the upstream side in the circumferential direction. Each folding blade is provided in the middle of the two needle members so as to be positioned substantially at the center of the sheet-fed sheet group FP held by the needle member on the upstream side in the transport direction.

Each needle member and each folding blade project radially outward from the peripheral surface of the folding cylinder 16 at an appropriate timing by an appropriate means such as a cam mechanism, and radially outward from the peripheral surface of the folding cylinder 16 at an appropriate timing. It is designed to immerse you inside.

Specifically, each needle member protrudes radially outward from the peripheral surface of the folding cylinder 16 so as to pierce the tip portion of the continuous paper W (sheet-leaf sheet group FP) cut by the saw cylinder 14 in the transport direction. After that, at the timing when the folding cylinder 16 rotates half a circumference or N circumference + half circumference (N is an integer of 1 or more), it is configured to immerse in the radial inward from the peripheral surface of the folding cylinder 16 and release the holding of the single-wafer-shaped sheet group FP. ing.

Further, each folding blade has a pair of folding drag rollers 20a, each time a pair of folding drag rollers 20a, 20b are provided, or a state in which a desired number of sheet-fed sheet group FPs are laminated. Each time the position 20b is reached, as shown in FIG. 3, a pair of folding drag rollers project radially outward from the peripheral surface of the folding cylinder 16 and pierce the central portion of the sheet-fed sheet group FP in the transport direction. It is configured to be pushed in between 20a and 20b, and at other positions, to be immersed in the radial direction from the peripheral surface of the folding cylinder 16.

The folding cylinder 16 adjusts the phase of the drive unit that causes each folding blade to appear and disappear based on the adjustment signal from the folding position control unit 64 of the folding position adjusting control unit 60, which will be described later, so that the folding blade appears and disappears. (That is, the pushing timing of the sheet-fed sheet group FP) can be adjusted. The configuration of each folding blade and the drive portion of the folding blade, and the configuration of the mechanism for adjusting the protrusion timing of each folding blade (pushing timing of the single-wafer-shaped sheet group FP) are described in Patent Document 1 (Japanese Patent Laid-Open No. 2002-120968). No.) and various known configurations disclosed in, for example, Japanese Patent Application Laid-Open No. 7-242367, Japanese Patent No. 5425294, Japanese Patent No. 5427976, etc. can be arbitrarily adopted, and detailed description thereof will be omitted.

Immediately below the folding cylinder 16, a pair of folding drag rollers 20a and 20b that fold the sheet-fed sheet group FP in half in the width direction (direction orthogonal to the transport direction) to create a signature S are provided on the folding cylinder 16. It is provided at intervals that allow the folding blades to pass in the axial direction. These pair of folded drag rollers 20a and 20b rotate a roller portion and a roller portion that rotate in the same direction as the transport direction of the single-leaf sheet group FP at a peripheral speed equal to the transport speed of the single-leaf sheet group FP, respectively. It is provided with a roller support portion (not shown) that can support the roller portions and a gap adjusting mechanism (not shown) that adjusts the gap between the pair of roller portions 22. In the folding machine 10 according to the present embodiment, various known folding rollers 20a and 20b can be used, and thus the description thereof will be omitted.

[Configuration of folding machine control system]
Further, as shown in FIGS. 1 and 2, the folding machine 10 has a folding machine control unit 58 that executes various controls of the folding machine 10 and a graphic that can set and input various information and the like used for driving control of the folding machine 10. It is possible to detect the passage of the panel 56, the folding cylinder rotation pulse transmitter (FPG) 51 that detects the number of rotations (number of printed copies) of the folding cylinder 16, and the signature S that passes through the pair of folding drag rollers 20a and 20b. It includes a sensor 52 and a fold position adjusting control unit 60 that executes a process for adjusting the fold position of the signature S. In the present embodiment, the folding machine control unit 58, the graphic panel 56, and the folding position adjusting control unit 60 are provided in the control box 10a attached to the outer surface SF on the operation side of the folding machine 10. Not limited to.

The folding machine control unit 58 is electrically connected to each driving unit of the signature length measuring unit 62, the graphic panel 56, and the folding machine 10, which will be described later, of the fold position adjusting control unit 60, and is stored in advance. By executing the program by the CPU, the control of the entire folding machine 10 can be executed. As such a folding machine control unit 58, for example, a PLC (Programmable Logic Controller) or the like can be adopted. In the present embodiment, the folding machine control unit 58 stores the fold position adjusting control program described later, and the CPU also functions as the fold position control unit 64 described later in the fold position adjusting control unit 60. Except for the point, since the folding machine control unit normally mounted on the printing machine can be adopted, the detailed description thereof will be omitted.

The graphic panel 56 is configured to display various setting screens for inputting various information and the like used for driving control of the folding machine 10, and to accept setting input of various information via the setting screen. Further, the graphic panel 56 is configured to be able to switch ON / OFF of automatic adjustment by the fold position adjusting control unit 60. Further, the graphic panel 56 is configured to be able to appropriately display an error message and perform notification processing such as an alarm. The graphic panel 56 includes a storage unit (not shown) in which a program for operating the graphic panel 56 is stored, and is configured to operate based on this program. In the present embodiment, the graphic panel 56 is a setting screen for diverting a general-purpose graphic panel normally mounted on a printing machine and setting and inputting information necessary for controlling the fold position adjusting control unit 60. (Not shown) is arbitrarily added.

The folding cylinder rotation pulse transmitter 51 is configured to output a predetermined number of pulses according to the rotation phase of the folding cylinder 16, and by measuring the output number of the pulses, the rotation speed of the folding cylinder 16 (and The number of copies to be printed) etc. can be detected. Since various known configurations can be adopted for such a folding cylinder rotation pulse transmitter 51, detailed description thereof will be omitted.

As shown in FIGS. 3 and 4, the sensor 52 includes a light projecting unit 52a capable of outputting a visible light laser and a light receiving unit 52b capable of receiving a visible light laser output by the light projecting unit 52a. There is. The light projecting unit 52a and the light receiving unit 52b are arranged so as to face each other on the passing path of the signature S passing through the pair of folding drag rollers 20a and 20b so as to sandwich the passing path. The visible light laser output from the light projecting unit 52a is blocked by the signature S and does not reach the light receiving unit 52b when passing through. The sensor 52 may be newly attached to an existing or newly manufactured folding machine, or the paper jam sensor installed in the existing folding machine may be diverted. Further, the sensor 52 is not limited to the visible light laser, and any appropriate sensor 52 can be used as long as it is a detection means that can reliably detect the passage of the signature S in a non-contact manner in real time.

The sensor 52 continues to output an OFF signal to the fold position adjusting control unit 60 while the visible light laser output from the light projecting unit 52a reaches the light receiving unit 52b, and outputs the OFF signal from the light emitting unit 52a. The visible light laser is configured to continue to output an ON signal to the fold position adjusting control unit 60 while it is blocked by the signature S and does not reach the light receiving unit 52b. The stitch position adjusting control unit 60 is configured to be able to specify the length of the signature S in the transport direction and detect defective paper S'in which the crease position is deviated as shown in FIG. 5 (b). ing.

In this embodiment, as shown in FIGS. 3 and 4, two sensors 52 are installed apart from each other in the width direction of the signature S (the axial direction of the folding drag rollers 20a and 20b). Specifically, the sensor 52 includes an RF side sensor 52RF arranged on one end side (rear surface RF side of the former 12) of the signature S in the width direction and the other end side (former) of the signature S in the width direction. It is provided with an FF side sensor 52FF arranged on the front FF side of the twelve. The RF side sensor 52RF and the FF side sensor 52FF are configured to output an OFF signal and an ON signal to the fold position adjusting control unit 60, respectively, whereby the fold position adjusting control unit 60 is configured. , The length of the signature S in the transport direction on the one end side in the width direction and the length in the transport direction on the other end side in the width direction are specified, and the signature S is folded in half diagonally as shown in FIG. It is also configured to be able to detect defective paper S ″.

[Configuration of crease position adjustment control unit]
The fold position adjusting control unit 60 detects a fold position defect of the signature S by measuring the length of the signature S in the transport direction, and automatically determines the fold position of the signature S on the folding cylinder 16. In order to make adjustments, it is configured to output an adjustment signal to the folding cylinder 16 (the driving unit that causes each folding blade to appear and disappear).

Specifically, as shown in FIGS. 1 and 2, the fold position adjusting control unit 60 can measure the length of the signature S passing through the pair of folding drag rollers 20a and 20b in the transport direction. An adjustment signal for adjusting the fold position of the signature S is output based on the length of the signature S measured by the signature length measuring unit 62 and the signature length measuring unit 62 in the transport direction. The crease position control unit 64 is provided.

The signature length measuring unit 62 is electrically connected to the sensor 52 so that the OFF signal and the ON signal output from the sensor 52 are input, and is based on the OFF signal and the ON signal output from the sensor 52. It is configured to measure the length of the signature S in the transport direction.

Specifically, as shown in FIG. 7, the signature length measuring unit 62 has a pulse width of the ON signal output from the sensor 52 (“FF side sensor 22FF output” and “RF side sensor 22RF output” in FIG. 7). It is configured so that the passage (passing time) of the signature S can be specified based on (see). Further, in the signature length measuring unit 62, the pulse output from the folding cylinder rotation pulse transmitter 51 is continuously input during the operation of the printing machine 1, and the pulse width of the ON signal (passing through the signature S). By measuring the number of times the pulse of the folding cylinder rotation pulse transmitter 51 is input (see "output of the folding cylinder rotation pulse transmitter 51" in FIG. 7), the length of the signature S in the transport direction is measured. Is configured to be able to be calculated sequentially in real time.

In the present embodiment, the operating speed (printing speed) of the printing machine 1 is calculated by calculating the length of the signature S in the transport direction using the number of pulses output from the folding cylinder rotation pulse transmitter 51. It has an advantage that the length of the signature S in the transport direction can be measured without being affected by the above. The pulse width of the pulse output from the folding cylinder rotation pulse transmitter 51 can be set to, for example, about 0.1 to 0.01 times the pulse width of the ON signal at the time of good paper. The pulse width is not limited to this, and the pulse width may be shorter than the passing time (shielding time) of the signature S passing at high speed.

As described above, the signature length measuring unit 62 is based on the ON signal output detected by the sensor 52 and the number of pulse inputs output from the folding cylinder rotation pulse transmitter 51 during the ON signal output. It is configured to measure the length of the signature S in the transport direction. Further, the signature length measuring unit 62 is configured to output the measured length of the signature S in the transport direction to the fold position control unit 64. As the signature length measuring unit 62 having such a configuration, for example, a high-speed counter unit such as a digital time interval meter can be arbitrarily adopted.

The length of the signature S in the transport direction may be calculated not by the signature length measuring unit 62 but by the fold position control unit 64. That is, in the present specification, the "signature length measuring unit 62 capable of measuring the length of the signature S in the transport direction" means the length of the signature S in the transport direction in the signature length measuring unit 62. Not limited to the configuration to be calculated, information for calculating the length of the signature S in the transport direction in the signature length measuring unit 62 (in this embodiment, the number of inputs of the input pulse input within the pulse width of the ON signal). ), And the length of the signature S in the transport direction is calculated on the crease position control unit 64 side based on the measurement.

The fold position control unit 64 acquires information on the length of the signature S in the transport direction measured by the signature length measuring unit 62, and based on the acquired length of the signature S in the transport direction, the crease position control unit 64 obtains information. It is configured so that an adjustment signal for adjusting the pushing timing of the sheet-fed sheet group FP by the folding blade can be output to the folding cylinder 16 (the driving unit that causes each folding blade to appear and disappear).

Specifically, the crease position control unit 64 is first determined in advance as the length of the signature S in the transport direction (L'in FIG. 5B) measured by the signature length measuring unit 62. Comparing the length (reference length) of the signature S in the transport direction (L in FIG. 5 (a)) when the paper is good, the difference between these two lengths (ΔL in FIG. 5 (b)) is acceptable. It is configured to determine whether the range is exceeded.

Here, the length (reference length) of the signature S in the transport direction when the paper is good is half the length in the height direction of one page of the newspaper (for example, the length in the height direction of one page of the newspaper is 541 mm). In some cases, it can be set to 270.5 mm). However, the configuration is not limited to such a configuration in which the reference length is set manually. For example, the length in the transport direction of a predetermined number of copies is measured at the time of forming good paper, and the reference length is automatically calculated and captured based on this. It may be configured. Further, such switching between the manual setting regarding the reference length and the automatic capture may be operated via the graphic panel 56, and the number of measurement units for calculating the reference length is the graphic panel 56. It may be arbitrarily set via. In the present embodiment, as described above, the length of the signature S in the transport direction is measured by the number of pulses of the folding cylinder rotation pulse transmitter 51 during the ON signal output of the sensor 52, and thus is the reference length. The permissible range is also preferably determined by the number of pulses without being converted into a numerical value in length units such as mm.

The permissible range can be arbitrarily set according to the required quality accuracy and the like. Further, it is preferable that the permissible range can be set individually for each situation such as constant speed, speed increase, and deceleration, but the permissible range is not limited to this. Further, it is preferable that the permissible range can be individually set for each of the permissible range in the advancing direction (see FIG. 8) with respect to the reference length and the permissible range in the delay direction (see FIG. 8) with respect to the reference length. However, it is not limited to this. The determination of good paper is not limited to the determination of whether or not the difference ΔL between the two lengths is within the allowable range of good paper. For example, the length L'in the transport direction of the signature S is directly determined. It may be the threshold value determination used.

Further, the crease position control unit 64 determines that the crease position is displaced when the difference between the two lengths (ΔL in FIG. 5B) exceeds the permissible range, and the signature It is configured to output an adjustment signal for adjusting the fold position of S. Specifically, the fold position control unit 64 has an adjustment direction specifying control for specifying the adjustment direction of the fold position of the signature S, and an adjustment control for adjusting the fold position of the signature S up to an allowable range. It is configured so that the adjustment signal for executing the above can be output step by step.

That is, when the fold position control unit 64 determines that the fold position is displaced, the adjustment signal (adjustment direction specifying control) for adjusting the fold position of the signature S in the advancing direction or the lagging direction is performed. By outputting the adjustment signal for execution) and monitoring the change in the length of the signature S in the transport direction (the number of pulses during the ON signal output), the adjustment direction of the fold position of the signature S is specified. It is configured as. The adjustment amount (adjustment drive time) in the advancing direction or the lagging direction and the period for monitoring the change (the number of signatures S passed during monitoring) can be arbitrarily set via the graphic panel 56. ..

Here, as shown in FIG. 5A, the signature S has a top side Sa and a ground side Sb centered on the fold, and generally advances at the fold position of the signature S (). When adjusted in the ADV) direction (see FIG. 8), the length of the top side Sa becomes longer (see FIG. 5 (b)), and conversely, the fold position of the signature S is delayed (RET). When adjusted in the direction (see FIG. 8), the length of the ground side Sb becomes longer.

Utilizing such a relationship, the fold position control unit 64 according to the present embodiment outputs, for example, an adjustment signal for adjusting the fold position of the signature S in the "advancing direction", thereby folding. If the length of the Ding S in the transport direction (L'in FIG. 5B) becomes longer, it should be determined that the top side Sa is originally a long crease position defect and the crease position should be adjusted. It is configured to specify that the direction (adjustment direction) is the "lagging direction". On the contrary, when the length of the signature S in the transport direction (L'in FIG. 5B) is shortened by adjusting the "advancing direction", the fold position control unit 64 may reduce the length of the signature S in the transport direction. Originally, it is determined that the ground side Sb has a long crease position defect, and the direction in which the crease position should be adjusted (adjustment direction) is specified as the "advancing direction". The direction to be adjusted first in the adjustment direction specifying control may be a delay direction instead of a lead direction. Further, it may be configured so that it can be set or selected in advance via the graphic panel 56 whether the direction in which the first operation is performed is the forward direction or the lagging direction.

Further, the fold position control unit 64 again determines whether or not the difference between the two lengths (ΔL in FIG. 5B) exceeds the permissible range after executing the adjustment direction specifying control, and still exceeds the permissible range. If it is determined that the signature S is used, feedback control is executed to adjust the fold position of the signature S toward the adjustment direction specified by the adjustment direction specification control until the difference between the two lengths reaches the allowable range. It is configured as. The adjustment amount (adjustment drive time) in the advancing direction or the lagging direction in the feedback control and the period for monitoring the change (the number of signatures S passed during monitoring) are arbitrarily set via the graphic panel 56. It is possible, and these adjustment amounts and monitoring periods can be set differently from the adjustment amounts and monitoring periods during the adjustment direction specific control.

In the present embodiment, the fold position control unit 64 is not physically independent of the fold machine control unit 58, but the fold position adjustment control program stored in the fold machine control unit 58 is the fold machine. It is configured to be realized by being executed by the CPU of the control unit 58. That is, in the present embodiment, the fold position adjusting control program performs the fold position control process for adjusting the fold position of the signature S based on the length of the signature S in the transport direction. It is configured to be executed by the machine 10), and the output from the signature length measuring unit 62 is input to the folding machine control unit 58, and in response to this, the CPU of the folding machine control unit 58 controls the folding position adjustment. By executing the program, the function of the fold position control unit 64 described above is executed. However, the configuration is not limited to this, and the fold position control unit 64 and the fold machine control unit 58 may be physically independent of each other.

The printing press 1 according to the present embodiment having the above configuration can be newly manufactured by assembling each of the above-described configurations, or existing printing without the above-mentioned fold position adjusting control unit 60. The above-mentioned signature length measuring unit 62 (for example, a high-speed counter unit) is added to the machine, and the above-mentioned fold position control unit 64 is added (for example, for the above-mentioned fold position adjustment to the fold machine control unit 58). By adding a control program), it is possible to modify (upgrade) an existing printing machine and manufacture it. When the existing printing machine is modified and manufactured, a setting screen for setting and inputting information necessary for controlling the fold position adjusting control unit 60 is displayed on the graphic panel 56 as necessary. It is preferable to add it.

[Fold position adjustment method]
Next, a crease position adjusting method performed by using the printing machine 1 according to the present embodiment will be described with reference to FIG. Here, FIG. 9 is a flowchart showing a schematic flow of the fold position adjusting method according to the present embodiment. Note that, in FIG. 9, controls (processes) and configurations that are unnecessary for explanation are omitted.

When the operation of the printing machine 1 is started, it is specified each time whether the status of the printing machine 1 is the speed increasing, the constant speed, or the deceleration (S1), and the crease position adjustment control unit. The signature length measuring unit 62 of 60 sequentially measures the length of the signature S in the transport direction in real time by the method described above (S2: signature length measuring step).

Further, for each signature S whose length in the transport direction is measured by the signature length measuring process, it is determined whether or not the measured length in the transport direction is within the permissible range of good paper. S3: First good paper determination step). Specifically, the length in the transport direction by the signature length measuring process and the length in the transport direction (reference length) of the signature S automatically taken in by a predetermined or described method when the paper is good. ), And it is determined whether or not the difference between these two lengths exceeds the allowable range. The good paper determination may be performed not by the difference but by determining whether or not the length of the signature S in the transport direction exceeds a predetermined allowable threshold value.

Then, in the first good paper determination step, when it is determined that the good paper is within the allowable range (YES in S3), it is determined that the paper is good, and the crease position is adjusted. Instead, it shifts to the next good paper judgment of the signature S. On the other hand, in the first good paper determination step, when it is determined that the good paper is not within the allowable range (NO in S3), a crease position defect (misalignment of the crease position) has occurred. Is determined, and the crease position is adjusted immediately.

In the fold position adjusting method according to the present embodiment, the fold position is adjusted by the adjustment direction specifying step of specifying the adjustment direction of the fold position of the signature S and the fold position of the signature S up to the allowable range. It is executed step by step by the adjustment control process (feedback control process) for adjusting.

Specifically, first, when it is determined that a crease position defect has occurred, the crease position of the signature S is adjusted to either the advance direction or the delay direction, whichever is preset or selected in advance. By monitoring the change in the length of the signature S in the transport direction (the number of pulses during shading), the adjustment direction of the fold position of the signature S is specified (S4: adjustment direction specifying step).

Then, after specifying the adjustment direction of the fold position of the signature S, the good paper determination is executed again by the same method as the first good paper determination step described above (S5: second good paper determination step). Then, in the second good paper determination step, when it is determined that the good paper is within the allowable range (YES in S5), it is determined that the good paper is good, and the adjustment control step (feedback control step). Is not executed, and the process proceeds to the next good paper determination of the signature S. On the other hand, when it is determined in the second good paper determination step that the paper is not within the allowable range (NO in S5), the crease position defect (misalignment of the crease position) is still eliminated. Until it reaches the permissible range (until YES in S7), the crease position is adjusted in the specified adjustment direction (S6: crease position adjustment step), and the signature S is conveyed. Adjustment control (so-called feedback control) that repeatedly measures the length of the paper and determines good paper (S7: third good paper determination step) is executed (adjustment control step).

When the allowable range is reached by this adjustment control (YES in the third good paper determination step of S7), the adjustment control is stopped and the process proceeds to the next good paper determination of the signature S.

The fold position adjusting method according to the present embodiment automatically detects the deviation of the fold position of the signature S by the above steps, and automatically adjusts the fold position so that the deviation of the fold position is corrected. Can be adjusted. In the crease position adjusting method according to the present embodiment, when it is difficult to correct by adjusting the crease position, for example, when a defective paper S ″ in a state of being folded in half diagonally is detected. , It is also possible to take stop measures such as emergency stop of the printing machine 1 and notification measures such as notifying an error.

[Advantages of the printing press according to this embodiment]
As described above, the fold position adjusting control unit 60 according to the present embodiment can measure the length of the signature S passing through the pair of folding drag rollers 20a and 20b in the transport direction. Fold position control that outputs an adjustment signal for adjusting the fold position of the signature S based on the length of the signature S measured by the section 62 and the signature length measuring unit 62 in the transport direction. It is provided with a unit 64.

By providing such a configuration, the printing press 1 according to the present embodiment automatically measures the deviation of the fold position of the actually formed signature S, and corrects the deviation of the fold position. Since the crease position can be adjusted automatically, the operator does not need to make manual adjustments, the work load can be drastically reduced, and waste paper can be reduced without relying on highly specialized skills. It will be possible to contribute.

In particular, in the fold position adjusting control unit 60 according to the present embodiment, as described above, the fold position control unit 64 adjusts the fold position of the signature S in the advancing direction or the lagging direction, and the fold position of the signature S is adjusted. By monitoring the change in the length in the transport direction, it is configured to specify the adjustment direction of the fold position of the signature S. According to such a configuration, it is possible to specify the adjustment direction of the crease position without relying on the operator's visual inspection or the like, so that it is possible to perform automatic adjustment more stably.

Further, in the fold position adjusting control unit 60 according to the present embodiment, as described above, the fold position control unit 64 has the length in the transport direction of the signature S measured by the signature length measuring unit 62. Based on the feedback control, it is configured to be able to output an adjustment signal for executing the adjustment control for adjusting the fold position of the signature S up to a predetermined allowable range. With such a configuration, it is possible to accurately bring the crease position closer to the reference length of the signature S.

Further, as described above, the fold position adjusting control unit 60 according to the present embodiment determines the passing time of the signature S detected by the sensor 52 (ON signal output in the present embodiment) and the rotation of the folding cylinder 16. The length of the signature S in the transport direction based on the number of inputs of the pulse output (in this embodiment, the pulse output from the folding cylinder rotation pulse transmitter 51) within the passing time (ON signal output). It is configured to measure the pulse. According to such a configuration, it is not affected by the operating speed (printing speed) of the printing machine 1, and even if the speed for producing the signature S (operating speed of the printing machine 1) is extremely high. It has the advantage that the length of the signature S in the transport direction can be accurately measured.

Although the preferred embodiments of the present invention have been described above, the technical scope of the present invention is not limited to the scope described in the above-described embodiments. Various changes or improvements can be made to each of the above embodiments.

For example, in the printing machine 1 according to the present embodiment, the embodiment in which only one folding machine 10 is installed has been described as an example, but the present invention is not limited to this, and two or more folding machines 10 may be installed. .. Further, in this case, the folding machine control unit 58 and the graphic panel 56 are shared by the plurality of folding machines 10, and the sensor 52 and the folding position adjusting control unit 60 are provided in each of the plurality of folding machines 10. It is also good.

In the above-described embodiment, the adjustment direction specifying control for specifying the adjustment direction of the fold position of the signature S has been described, but the present invention is not limited to this, and the adjustment direction specifying control may not be executed. ..

In the above-described embodiment, the feedback control for adjusting the fold position of the signature S is executed up to a predetermined allowable range, but the present invention is not limited to this. For example, it may be configured to execute feedforward control for adjusting the fold position of the signature S based on a predetermined set amount, or after executing feedback control up to a predetermined range wider than the allowable range. It may be configured to execute two-step control for switching to feedforward control.

In the above-described embodiment, the passage time of the signature S detected by the sensor 52 (ON signal output) and the pulse output with the rotation of the folding cylinder 16 (pulse output from the folding cylinder rotation pulse transmitter 51). ) Has been described as being configured to measure the length of the signature S in the transport direction based on the number of inputs within the passage time, but the present invention is not limited to this, and the length of the signature S in the transport direction is not limited to this. Various configurations can be adopted as long as the configuration can measure the pulse.

In the above-described embodiment, it has been described that two sensors 52 are installed apart from each other in the width direction of the signature S (axial direction of the folding cylinder 16), but the present invention is not limited to this, and the width direction of the signature S is not limited to this. Only one unit may be installed at an arbitrary position, or three or more units may be installed.

It is clear from the description of the claims that the above-mentioned modifications are included in the scope of the present invention.

1: Printing machine 10: Folding machine 10a: Control box 12: Former 14: Saw cylinder 16: Folding cylinder 18a: Forming rollers 18b, 18c, 18e: Nipping rollers 18d: Guide rollers 20a, 20b: Folding drag rollers 22: Roller part 30: Impeller device 32: Conveyance mechanism 51: Folding cylinder rotation pulse oscillator (FPG)
52: Sensor 52FF: FF side sensor 52RF: RF side sensor 52a: Floodlight part 52b: Light receiving part 56: Graphic panel 58: Folding machine control unit 60: Folding position adjustment control unit 62: Signature length measuring unit 64 : Fold position control unit FP: Sheet sheet group S: Signature Sa: Top side Sb: Ground side S', S'': Defective paper W: Continuous paper FF: Former front side RF: Former back side ADV: Advance RET: Delay

Claims (9)

It is a fold position adjustment control unit for adjusting the fold position of a signature formed by folding a group of sheet-fed sheets in half with a pair of folding drag rollers.
A signature length measuring unit capable of measuring the length of the signature in the transport direction passing through the pair of folding drag rollers, and a signature length measuring unit.
It is provided with a fold position control unit that outputs an adjustment signal for adjusting the fold position of the signature based on the length of the signature in the transport direction measured by the signature length measuring unit. A control unit for adjusting the crease position. The crease position control unit adjusts the fold position of the signature in the advancing direction or the lagging direction, and monitors the change in the length of the signature in the transport direction to monitor the crease position of the signature. The control unit for adjusting a fold position according to claim 1, wherein the control unit is configured to specify an adjustment direction. The fold position control unit adjusts the fold position of the signature to an allowable range by feedback control based on the length of the signature in the transport direction measured by the signature length measuring unit. The fold position adjusting control unit according to claim 1 or 2, wherein an adjustment signal for executing control can be output. The control unit for adjusting the fold position according to any one of claims 1 to 3 and the control unit for adjusting the fold position.
A pair of folding drag rollers that form a signature by folding a group of sheet-fed sheets in half,
It is provided with a folding cylinder having a folding blade that pushes the central portion of the single-wafer-shaped sheet group in the transport direction between the pair of folding drag rollers.
The fold position adjusting control unit adjusts the pushing timing of the sheet-fed sheet group by the fold blade based on the length of the signature in the transport direction measured by the signature length measuring unit. A folding machine characterized in that it is configured to be able to output the adjustment signal of. Further equipped with a sensor capable of detecting the passing time of the signature passing through the pair of folding drag rollers.
The claim is characterized in that the fold position adjusting control unit is configured to measure the length of the signature in the transport direction based on the passage time of the signature detected by the sensor. The folding machine described in 4. The crease position adjusting control unit is based on the passage time of the signature detected by the sensor and the number of inputs of the pulse output with the rotation of the folding cylinder within the passage time. The folding machine according to claim 5, wherein the folding machine is configured to measure the length of the signature in the transport direction. A paper feed section in which the roll-up paper, which is a roll of continuous paper, is set.
A printing unit that prints on continuous paper supplied from the paper feed unit, and a printing unit.
It is equipped with a folding machine that cuts continuous paper after printing to create individual sheet-fed sheets and folds the sheet-sheets in half to create a signature.
The printing machine according to any one of claims 4 to 6, wherein the folding machine is the folding machine. It is a control program for fold position adjustment that causes a printing machine to adjust the fold position of a signature formed by folding a group of sheet-fed sheets in half with a pair of folding drag rollers.
A control program for adjusting a fold position, which comprises causing the printing machine to execute a fold position control process for adjusting the fold position of the signature based on the length of the signature in the transport direction. It is a fold position adjustment method for adjusting the fold position of a signature formed by folding a group of sheet-fed sheets in half with a pair of folding drag rollers.
A signature length measuring process for measuring the length of the signature in the transport direction passing through the pair of folding drag rollers, and a signature length measuring step.
The fold position is characterized by including a fold position control step of adjusting the fold position of the signature based on the length of the signature in the transport direction measured by the signature length measuring step. Adjustment method.

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